After looking for a nice, compact spectrum analyzer / vector network analyzer for my home lab, I recently pulled the trigger on a used JDSU / VIAVI JD785A.
I previously had a look at the existing JD745A threads and found that they provide easy root login by running a script as root from a USB stick. Unfortunately, the newer JD745B, JD785A, JD785B models share a firmware that no longer exhibits this behavior. Instead, there is a binary recovery OS that allows to install another, binary, firmware file.
The recovery consists of the files Recovery and Recovery_lk2, which appear to be the same, and a system.dat containing the emergency OS. As for the Firmware itself, it has some version information at the beginning and the rest appears to be compressed or encrypted, but other than that, there is no indication on its composition.
Has anyone been lucky in obtaining root, or information on the firmware structure?
Thanks